Perform the indicated operation.
-$32_ { \text {eight } }- 13 _ { \text {eight } }$
A) $45 _ { \text {eight } }$
B)$ 17_ { \text {eight } }$
C) $27_ { \text {eight } }$
D) None of these

Question

Quizplus · Accepted Answer

To perform the subtraction $32_8 - 13_8$ in base 8 (octal), we subtract like in base 10, but carry/borrow with respect to base 8. Subtracting the digits, we get $2 - 3$ which is not possible without borrowing. So, we borrow 1 (which is 8 in base 10) from the 3 (in the tens place), making it 2 and the 2 becomes 12 (in base 8). Now, $12_8 - 3_8 = 7_8$, and $2_8 - 1_8 = 1_8$, giving us $17_8$.

Perform the Indicated Operation 32eight −13eight 32_ { \text {eight } }- 13 _ { \text {eight } }32eight ​−13eight ​

Perform the Indicated Operation $32_ { \text {eight } }- 13 _ { \text {eight } }$